JP2015071474A - Vibration-sensitive article fall prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-sensitive article fall prevention device capable of surely preventing an article from falling with vibration by an earthquake or the like.SOLUTION: There are included: a stopper member 6 capable of descending between an upper position and a prescribed position which do not influence taking in and out at least an article on a shelf stage in the vertical direction of a shelf stage 5, and provided so as to inhibit the article on the shelf stage from falling in the prescribed position; a support part 20 fixedly supporting the stopper member 6 on a vector X of a moving force given to the stopper member 6, regulating the movement of the stopper member 6, and releasing the regulation by bending or inflecting; and vibration-sensitive actuation means 3 including a vibration-sensitive movement part 30 reacting with the vibration of a shelf 2 and moving to the front/back direction of the shelf 2, and a regulation releasing part 32a for releasing regulation in the support part 20 with the movement of the vibration-sensitive movement part 30. The vibration-sensitive actuation means 3 is so formed as not to release regulation in the support part 20 by the regulation releasing part 32a when the vibration-sensitive movement part 30 moves to the front/back direction of the shelf 2.

Description

  The present invention relates to an anti-seismic article fall prevention device that can prevent an article such as a book placed on a shelf of an article storage shelf such as a book shelf from falling due to vibration such as an earthquake.

  As a conventional seismic-sensing article fall prevention device, for example, as disclosed in Patent Document 1, a horizontal member (a recumbent portion) oriented horizontally along a shelf front surface and a horizontal member can be freely engaged and disengaged. An engagement support mechanism for supporting and a pendulum, etc., and when the pendulum responds to vibration, the engagement of the engagement support mechanism is released and the horizontal member is moved down to a predetermined position where the article can be prevented from falling. There is one that can prevent the article placed on the board from falling (for example, see Patent Document 1).

JP-A-9-173170 (3rd page, FIG. 6)

  In such a seismic-type article fall prevention device, when a strong shaking occurs that moves the article forward from the storage shelf, the weight on the pendulum and the article on the storage shelf are on the same front side. In this structure, the end of the pendulum and the engagement support mechanism are disengaged by this movement, and the horizontal member is rotated downward. For this reason, when a strong swing that moves the article forward from the storage shelf occurs, the pendulum engages with the engagement support mechanism at the timing when the article falls to the front side due to the shake or moves to the front side. It acts on the joint portion to release the engagement, and the horizontal member is rotated downward.

  However, in the worst case, at the timing when the article is moved and when the engagement support mechanism is disengaged, the horizontal member falls to the upper or rear side of the article moved forward, and the article on the storage shelf is dropped. In some cases, it could not be prevented reliably.

  The present invention has been made paying attention to such a problem, and an object thereof is to provide a seismic-sensing article fall prevention device that can reliably prevent the fall of articles against shaking such as an earthquake. .

In order to solve the above problems, the seismic article falling prevention device of the present invention is
A stopper member provided so as to be able to descend between a predetermined position and an upper position that does not affect the loading and unloading of the article on the shelf in the vertical direction of the shelf, and to prevent the article on the shelf from falling at the predetermined position; ,
The stopper member is fixedly supported with respect to the vector of the moving force applied to the stopper member, and the movement of the stopper member is restricted, and the restriction is released by its bending or refraction. A support part;
A seismic motion actuating means comprising: a seismic moving part that moves in the front-rear direction of the shelf in response to shaking of the shelf; and a restriction releasing part that releases the restriction in the support part as the seismic moving part moves. And having
The seismic motion actuating means is characterized in that when the seismic motion moving part moves in the forward direction of the shelf, the regulation releasing part cannot release the restriction in the support part.
According to this feature, when the seismic motion moving unit moves in the forward direction of the shelf, the seismic motion moving unit has a structure in which the regulation in the support unit cannot be released by the regulation release unit. In this case, the movement of the stopper member in the support portion is not released, and the situation in which the stopper member falls to the upper or rear side of the article moved forward is reduced, and the stopper member is reliably moved in front of the article. Falling can be prevented.

The seismic moving part is a pendulum member arranged on the front side with respect to the support part, and the pendulum member has the restriction release part.
According to this feature, since the article and the pendulum at the time of seismic shake in the same direction, the movement period of relatively strong shaking at the time of the initial movement almost coincides, so that the stopper member can be surely moved when the article is moved backward. Falling can be prevented.

The support portion is formed by a winding spring that is arranged so that one end side is supported at a predetermined position and the other end side receives the moving force of the stopper member.
According to this feature, since the wire spring has a cylindrical shape, the coil spring is refracted with respect to the force applied from different directions with respect to the moving force vector applied to the stopper member because the wire spring is a wire. easy. Therefore, when the seismic motion moving part moves in the backward direction of the shelf, the stopper member can be immediately moved to prevent the fall.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an article storage shelf including a seismic article fall prevention device according to a first embodiment. 1 is a perspective view of a seismic-sensing article fall prevention device in Embodiment 1. FIG. It is a fracture | rupture expansion side view which shows the operation standby state of the seismic-type article fall prevention apparatus in Example 1. FIG. (A) is the fracture | rupture expansion side view which shows a mode that the seismic action actuating means in Example 1 act | operated, and the seismic action actuating means collided with the support part, (b) is also a recumbent part to a predetermined position. It is a figure which shows the state which started rotation. It is a fracture | rupture expansion side view which shows the state which the recumbent part in Example 1 completed the rotation to a predetermined position. (A) is a figure which shows the vibration phase in case the strong shaking which the article storage shelf moves to the front in the shaking of the initial movement by the earthquake etc. of the article and the seismic operation means in Example 1 (B) is a figure which shows the vibration phase when the swing which an article storage shelf moves back is performed after (a) similarly. It is a figure which shows the vibration phase when the strong shake which a goods storage shelf moves to the back is act | operated in the shake of the initial movement of the goods and seismic operation means in Example 1 by an earthquake. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which returns the seismic-type article fall prevention apparatus in Example 1 to an operation standby state, (a) is a figure which shows the state which pushed up the recumbent part upwards, (b) is also a recumbent It is a figure which shows the state which released the part and returned to the operation standby state. It is a fracture | rupture expansion side view which shows the modification of the seismic-type article | item fall prevention apparatus in Example 1. FIG. (A) is a fracture | rupture expansion side view of the seismic-sensing article | item fall prevention apparatus in Example 2, (b) is a fracture | rupture expansion top view similarly. It is a fracture | rupture expansion side view which shows the state which the seismic-sensing action | operation means in Example 2 act | operated with respect to the shake of the front-back direction. (A) is the fracture | rupture expansion side view of the seismic-type article fall prevention apparatus in Example 3, (b) is the fracture | rupture expansion side surface which similarly shows the state which the seismic-sensing action | operation means act | operated with respect to the shaking of the front-back direction. FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the seismic-type article | item fall prevention apparatus which concerns on this invention is demonstrated below based on an Example.

  The seismic-type article fall prevention device according to the first embodiment will be described with reference to FIGS. 1 to 9. An article storage shelf (hereinafter referred to as a shelf) 2 equipped with a seismic-type article fall prevention device (hereinafter referred to as a fall prevention device) 1 of the present invention shown in FIG. 1 includes side plates 4A and 4A that are separated in the left-right direction, The top plates 4B and 4B connecting the opposing surfaces of the upper end portions of the side plates 4A and 4A, and the upper and lower shelf plates 5 supported on the side surfaces facing each other of the side plates 4A and 4A. A plurality of books 15 are placed on the upper surface of the shelf board 5 at each stage. As will be described later, the fall prevention device 1 is attached to both ends of the upper surface of the shelf plate 5 of each stage. In the present embodiment, the fall prevention device 1 is described as being attached to a bookcase. However, the present invention is not limited to this. For example, the fall prevention device 1 may be used by being attached to a fixture or the like for displaying commodities. Hereinafter, description will be made on the basis of the front view of the shelf 2 as up and down, left and right, and front and rear directions.

  As shown in FIGS. 2 and 3, the fall prevention device 1 includes a pair of left and right supports 7, 7 having a substantially rectangular shape when viewed from the side, and a stopper member 6. The stopper member 6 includes both supports. 7 includes a pair of left and right arm portions 8 and 8 whose front end portions protrude from the inside, and a horizontal flange portion 9 whose left and right ends are fixed to opposite surfaces of the front end portions of both arm portions 8.

  Each of the left and right supports 7 includes a flat plate-like outer plate 7A and an inner plate 7B that is opposed to each other with substantially the same size. The upper and lower ends of the outer plate 7A are bent inward to form an upper bent portion 11 and a lower bent portion 14 so as to function as spacers. The upper bent portion 11 and the lower bent portion 14 The outer plate 7A and the inner plate 7B are brought into contact with each other by bringing the opposing surfaces of the plate 7B into contact with each other and screwing a plurality of bolts, nuts 13, 13,... They are connected in such a way that a required space is formed between the facing surfaces.

  Various members for raising and lowering the recumbent part 9 are incorporated in the supports 7 and 7. In the following description, the structure of the support 7 on the right side of the screen in FIG. 2 will be described, and the description of the other support 7 will be omitted.

  As shown in FIG. 3A, the above-described arm portion 8 is disposed slightly above the center of the support 7 in the vertical direction, and the rear end portion 8a is pivoted with respect to the outer plate 7A by the pivot 16. It is supported and can be rotated in the vertical direction with the pivot 16 as a fulcrum.

  The inner plate 7B is provided with a winding spring 20 as a support portion that spans the lower bending portion 14 and the central lower end portion 8b of the arm portion 8, and the lower end of the winding spring 20 is bolted to the upper surface 14a of the lower bending portion 14. 21 is fixed. Further, in the state where the winding spring 20 is not stretched and is arranged on the vertical line, the wire forming the winding spring 20 forms a cylindrical shape without a gap, and therefore the central lower end 8b side of the arm portion 8 of the winding spring 20 is provided. The load (moving force vector X) of the stopper member received by the step can be stably supported with a wide cylindrical section.

  That is, the arm portion 8 has the central lower end portion 8b as a load point and is supported on the upper surface 14a of the lower bent portion 14 via the winding spring 20. Further, when the load point of the arm portion 8 (center lower end portion 8b) and the bolt 21 on the upper surface 14a of the lower bent portion are arranged on the same vertical line, the load of the stopper member 6 when the support body 7 is in a horizontal state ( The moving force vector X) is supported by the lower bent portion 14 through the winding spring 20 in a well-balanced manner.

  As shown in FIGS. 3A and 3B, a pendulum member 30 that is a seismic moving part is pivotally supported on the front side of the inner plate 7B. The pendulum member 30 includes a rod-shaped portion 31 and a weight portion 32 fixed to the lower end thereof, and the upper end of the rod-shaped portion 31 is pivotally supported by a shaft portion 33 fixed to the inner plate 7B. As a result, the shaft portion 33 can be swung in the front-rear direction Y with the shaft portion 33 as a fulcrum, and is normally suspended vertically by its own weight. Is configured.

Next, the operation and usage of the fall prevention device 1 of the above embodiment will be described with reference to FIGS.
When the shelf 2 vibrates in the forward direction due to a predetermined or greater shake such as an earthquake, the pendulum member 30 is installed on the front side of the winding spring 20, so that the weight portion 32 is swung in the backward direction Y. As shown to 4 (a), the weight part 32 collides with the front side center part of the winding spring 20. FIG. The collision portion of the weight portion 32 with the winding spring 20 functions as the restriction release portion 32a.
Part of the winding spring 20 is refracted and deformed by the collision of the restriction release portion 32a, and the vector X of the moving force of the stopper member 6 is divided in different directions. Thereby, the support function by the winding spring 20 which is a support part is lost (refer FIG.4 (b)). As shown in FIG. 5, the stopper member 6 that has lost the supporting force by the winding spring 20 is rotated by its own weight with the pivot 16 serving as a fulcrum, and the horizontal flange 9 is rotated downward. The lower bent portion 14 functions as a restricting portion that is restricted by the arm portion 8 that is pivoted in the downward direction from being brought into contact. The book 15 is stable at a predetermined height, and the book 15 can be prevented from jumping forward due to shaking such as an earthquake.

  In detail, it demonstrates based on each vibration phase using FIG.6 and FIG.7 centering on the operation | movement timing of the seismic sensing operation means 3 mentioned above, and the positional relationship of the book 15. FIG. As shown in FIG. 6, when a strong swing more than a predetermined level is applied to the shelf 2, the book 15 is lowered by the friction between the book 15 and the shelf 5 and the lower corner 15 </ b> A on the front side and the lower side on the rear side. The direction portion 15B serves as a fulcrum, and the center of gravity is moved so that the fulcrum is tilted backward with the fulcrum as the center of rotation. When the pendulum member 30 shakes more strongly than the predetermined with respect to the shelf 2, the pendulum member 30 swings in the front-rear direction so that the weight part 32 and the restriction release part 32a remain in place, and the center of gravity moves. In addition, since the direction of shaking cannot be determined by various conditions such as its strength and installation position, it will be described here as causing the fall around the lower corners 15A and 15B as described above. For example, the movement is not limited to this, and the movement may simply slide backward.

FIG. 7 is a diagram showing the phase of center of gravity movement due to vibration of the book 15 and the pendulum member 30 due to shaking caused by an earthquake or the like, where the end point in the front direction of the book 15 is A and the end point on the rear side is B, and the natural state A period from the predetermined position α to A, and then back to the predetermined position α, further from the predetermined position to B, and then back to the predetermined position α will be described as 360 degrees of the vibration phase.
Similarly, assuming that the vibration phase of the restriction release unit 32a due to shaking is C as the end point in the forward direction and D as the end point on the rear side, it moves from the predetermined position β in the natural state to C, and then returns to the predetermined position β. One cycle from the predetermined position to D and then back to the predetermined position β will be described as a vibration phase of 360 degrees.

  In the case of a strong shake that causes the shelf 2 to move backward in the initial shake due to an earthquake or the like, as shown in FIG. In four cycles of 90 degrees (see FIG. 7), that is, particularly in the initial movement of the swing, the restriction release unit 32a moves from the predetermined position β to C so as to be substantially synchronized with the vibration phase of the book, and collides with the winding spring 20. There is nothing.

  Following the above state, when the shaking temporarily stops or the shaking that the shelf 2 is moved forward works, as shown in FIG. At this time, the restriction releaser 32a moves 180 degrees (see FIG. 7), which is a ½ cycle in the direction from C to D so as to be substantially synchronized with the vibration phase of the book. 20, the recumbent portion 9 is rotated downward.

  Further, even when a strong shake that causes the shelf 2 to move forward in the initial shake due to an earthquake or the like occurs, until the book 15 moves from the predetermined position α to B as shown in FIG. The pendulum member 30 moves from a predetermined position β to D so as to be substantially synchronized with the vibration phase of the book within 90 degrees (refer to FIG. 7), and collides with the winding spring 20 using the acceleration. Then, the recumbent part 9 is rotated downward.

  As described above, when a strong swing is applied such that the shelf 2 is moved forward, the timing at which the book 15 falls to the rear side around the lower corner 15B on the rear side, that is, as shown in FIG. The seismic operation means 3 is activated at the timing when the book 15 is moved backward from the predetermined position α in the natural state, and the recumbent portion 9 is rotated downward. Therefore, the recumbent part 9 can be rotated in a state where the book 15 does not exist on the rotation trajectory, and the recumbent part 9 is reliably moved in front of the book 15 to prevent the book 15 from falling. be able to.

  Further, at the timing when the book 15 falls backward with the lower corner portion 15B on the rear side as the center, the upper corner portion 15C on the front side of the book 15 moves rearward. It is the front part of the book 15 in an inclined state that is in close proximity to. Therefore, for example, the distance between the recumbent portion 9 and the pivot 16, that is, the length of the arm portion 8 is designed to be short so that the usability of the shelf 5 is not hindered, and the size of the fall prevention device 1 is made compact. However, the upper corner portion 15 </ b> C does not protrude on the turning track of the recumbent portion 9, and there is no possibility that the lowering of the recumbent portion 9 is hindered by the book 15.

Contrary to the above-described shaking, when strong shaking is applied such that the shelf 2 is moved backward, the book 15 is moved so as to fall forward with the lower corner portion 15A on the front side as the rotation center. Become. Then, the pendulum member 30 is arranged so that the weight portion 32 remains in place so that the weight portion 32 remains in place when a swinging force is applied such that the load of the article on the same shelf 5 as the swing described above is moved to the rear side. The pendulum member 30 is swung to the front side movement end point C side. Therefore, as shown in FIG. 6 (a), the book 15 falls to the front side (the book 15 front side movement end point A side) centering on the lower corner portion 15A on the front side, and the book 15 is in a predetermined position in a natural state. At the timing of moving forward from α, the seismic operation means 3 does not operate.
According to this, when the book 15 exists on the turning track of the recumbent part 9 or when the book 15 moves toward the turning track, that is, the descent of the recumbent part 9 is caused by the book 15. The fall prevention function is not activated at a timing at which it is likely to be obstructed, and the book 15 does not exist on the turning track of the recumbent part 9 as described above, and the recumbent part 9 is surely placed in front of the book 15. The fall prevention function can be operated at the timing as shown in FIG. 6B to be moved, and the recumbent portion 9 can be lowered, so that the article can be reliably prevented from falling.

  Next, the case where the fall prevention device 1 is returned to the operation standby state will be described with reference to FIG. As shown in FIGS. 8 (a) and 8 (b), the administrator of the fall prevention device 1 temporarily raises the horizontal flange 9 in a state of being lowered downward after operation to a predetermined height at which the winding spring 20 extends. Push up and release. The winding spring 20 once stretches and then returns to its natural linear shape by its own restoring force, and the stopper member 6 is supported by the upper surface 14 a of the lower bent piece 14 via the winding spring 20. When the coil spring 20 returns to its natural state after being stretched, the load point of the stopper member 6 (lower end 8b at the center of the arm 8) and the upper surface 14a of the lower bent piece are relatively attracted by its own shape recovery. By acting, it is possible to guide the load point of the stopper member 6 and the bolt 21 on the upper surface 14a of the lower bent piece so as to be positioned on the same vertical line, and to return to an operation standby state in which the load of the stopper member 6 is stable.

  Further, as shown in FIG. 3, in the standby state, the weight portion 32 of the pendulum member 30 and the winding spring 20 are arranged so as to be slightly separated from each other, so that the article such as the book 15 does not fall. It is possible to prevent the regulation release portion 32a from colliding with the winding spring 20 due to a shock and to prevent the fall prevention device 1 from malfunctioning.

  In addition, since the wire spring 20 serving as a support portion of the stopper member 6 has a cylindrical shape, the coil spring is not subjected to a force applied from a different direction Y with respect to the moving force vector X applied to the stopper member 6. Since 20 is a wire rod, it is easily refracted. Therefore, when the book 15 does not exist on the turning track of the recumbent part 9, that is, when the weight part 32 moves in the rearward direction of the shelf 2, the stopper member 6 and the recumbent part 9 are immediately moved to move the article. Can be prevented from falling.

  In the above-described embodiment, the winding spring 20 has been described in a mode of using a spring in which the wire members constituting the winding spring 20 are in contact with each other in the vertical direction while receiving the load of the arm portion 8. However, the present invention is not limited to this, and a spring that separates the wires constituting the winding spring 20 while receiving the load of the arm portion 8 may be used. Further, the winding spring 20 is not limited to a spiral spring, and may be formed by winding a wire rod into a triangular shape such as a triangle or a square. The winding spring 20 may be either a compression coil spring or a tension coil spring.

  Furthermore, the support portion that supports the stopper member 6 supports the stopper member 6 in a fixed manner with respect to the moving force vector X applied to the stopper member 6 and is different from the moving force vector X. The structure is not limited to the above-described winding spring 20 as long as the moving force vector X is divided in different directions by the force applied from the direction. For example, as shown in FIG. 9A, the upper end of the upper rod-shaped body 40 is pivotally connected to the arm portion 8, and the lower end of the lower rod-shaped body 41 is pivotally coupled to the bent piece 14. At the same time, the upper and lower rod-like bodies 40 and 41 may be supported by using a relatively pivotable connection by the shaft core 42. In this case, the relative rotation in one direction is limited. In addition to functioning, the contact portion between the protrusion 41a and the upper plate body 40 functions to support the load (moving force vector X) of the arm portion 8 and the recumbent portion 9.

  Next, a seismic article falling prevention apparatus according to the second embodiment will be described with reference to FIGS. In addition, the description which overlaps with the same structure as the said Example is abbreviate | omitted.

  In the seismic-sensing article fall prevention device 10 shown in FIG. 10 (a), the pendulum member 300 constituting the seismic sensing means 3 ′ is suspended by the suspension member 50 with respect to the pivot 55 on which the arm portion 8 is pivotally supported. The surrounding member 60 that is supported and functions as a restriction releasing portion extending from the pendulum member 300 is disposed so as to surround the vicinity of the front side and the left and right sides of the winding spring 20. The suspension support member 50 is rotatable in the front-rear direction with respect to the pivot 55, and further has a ring portion 57 that is rotatable in the left-right direction with respect to the suspension support member 50. Can swing with respect to shaking in the front-rear direction and the left-right direction in an earthquake or the like.

  As shown in FIG. 10B, the surrounding member 60 is formed by bending a rod-shaped body, and the front end 60 a of the rod-shaped body is in the front-rear direction with respect to the winding spring 20 in the normal state of the pendulum member 300. In addition, the left and right portions 60b and 60c of the rod-shaped body are shaped to be spaced apart from each other by a predetermined distance in the left-right direction.

  As shown in FIG. 11, when the shelf 2 vibrates in the forward direction due to a predetermined shaking such as an earthquake, the weight part 320 is swung in the backward direction Y, and the front end of the surrounding member 60 extending from the pendulum member 300 60a collides with the front center portion of the winding spring 20. Due to the collision of the front end 60a of the surrounding member 60, a part of the winding spring 20 is refracted and the moving force vector X of the stopper member 6 is divided in different directions. Thereby, the support function by the winding spring 20 which is a support part is lost, and the recumbent part 9 is rotated below. Although not particularly illustrated, when the shelf 2 vibrates in the left-right direction, the weight portion 320 is swung in the left-right direction, and the left and right portions 60b of the rod-like body of the surrounding member 60 extending from the pendulum member 300, as described above. When 60c collides with the winding spring 20, the support function by the winding spring 20 is lost, and the horizontal flange 9 is rotated downward.

  Further, the surrounding member 60 extending from the pendulum member 300 is configured such that a rod-like body located on the rear side of the winding spring 20 does not contact the winding spring 20. Therefore, as described above, when a swinging force is applied so that the load of the article on the shelf 5 moves backward, that is, the book 15 may cause the lowering of the recumbent portion 9 to be hindered. Then, the fall prevention function is not activated, and when a swinging force is applied such that the load on the shelf 5 moves forward as shown in FIG. The fall prevention function is activated at a timing at which the book 15 does not exist and the recumbent portion 9 can be reliably moved to the front of the book 15, and the article can be reliably prevented from falling.

  Next, the seismic-sensing article fall prevention device according to the third embodiment will be described with reference to FIG. In addition, the description which overlaps with the same structure as the said Example is abbreviate | omitted.

  The seismic motion actuating means 301 constituting the seismic motion actuating means 3 ″ in the seismic motion type article fall prevention device 100 shown in FIG. 12A is arranged behind the winding spring 20 and has the movable part 330 as the center of rotation. A rod-like portion 58 that functions as a restriction release portion is extended above the movable portion 330 while being pivotally supported by the outer plate 7A.

  As shown in FIG. 12 (b), when the shelf 2 vibrates in the forward direction due to a predetermined vibration such as an earthquake, the weight portion 321 is swung in the forward direction Y, and the rod-shaped portion 58 is Collide backwards. Part of the winding spring 20 is refracted and deformed by the collision of the rod-shaped portion 58, and the vector X of the moving force of the stopper member 6 is divided in different directions. Thereby, the support function by the winding spring 20 which is a support part is lost, and the recumbent part 9 is rotated below.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the pendulum member provided with a weight is used for the seismic operation means. However, as long as the configuration has a seismic function and a function of dividing the moving force vector X of the stopper member 6. The structure is not limited to the pendulum member. For example, a bottom surface may be provided in the support body 7 and the weight may be directly moved horizontally on the support body. The vector X of the moving force of the stopper member 6 at the portion may be divided.

  Further, the moving force of the stopper member 6 is not limited to the load of the stopper member 6 but may be a biasing means such as a spring.

  Further, the recumbent portion that prevents the article from falling is not limited to a rod-shaped member, and may be a cover member that covers the front surface of each shelf 5 when the fall prevention function is activated, for example. Furthermore, the predetermined position (height etc.) after the operation of the recumbent part may be adjustable according to the shape such as the height of the article.

DESCRIPTION OF SYMBOLS 1,10 Seismic-type article fall prevention device 2 Article storage shelf 3 Seismic operation means 4A, 4A Side plate 4B Top plate 5 Shelf 6 Stopper member 7, 7 Support body 7A Outer plate 7B Inner plate 8 Arm portion 8b Arm portion center Lower end portion 9 Horizontal flange portion 14 Lower bent piece 15 Book 15A Book front side lower corner portion 15B Book rear side lower corner portion 16 Axis 20 Winding spring (support portion)
30 Pendulum member (seismic moving part)
32 Weight part 32a Restriction release part 58 Bar-shaped part (restriction release part)
60 Go member (regulation release part)
300, 301 Pendulum member (seismic moving part)
320, 321 Weight part A Book front side movement end point B Book back side movement end point C Pendulum member front side movement end point D Pendulum member rear side movement end point X Movement force vector Y Force applied in the front-rear direction

Claims (3)

A stopper member provided so as to be able to descend between a predetermined position and an upper position that does not affect the loading and unloading of the article on the shelf in the vertical direction of the shelf, and to prevent the article on the shelf from falling at the predetermined position; ,
The stopper member is fixedly supported with respect to the vector of the moving force applied to the stopper member, and the movement of the stopper member is restricted, and the restriction is released by its bending or refraction. A support part;
A seismic motion actuating means comprising: a seismic moving part that moves in the front-rear direction of the shelf in response to shaking of the shelf; and a restriction releasing part that releases the restriction in the support part as the seismic moving part moves. And having
The seismic sensing means is structured such that when the seismic motion moving part moves in the forward direction of the shelf, the regulation releasing part cannot release the restriction in the support part. Fall prevention device.   The seismic sensing part according to claim 1, wherein the seismic sensing moving part is a pendulum member arranged on the front side with respect to the support part, and the pendulum member has the restriction release part. Type article fall prevention device.   3. The seismic article according to claim 1, wherein the support portion is composed of a winding spring arranged so that one end side is supported at a predetermined position and the other end side receives the moving force of the stopper member. Fall prevention device.

Images